<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:14pt"><div><span>Thanks a lot for replying,</span></div><div><span>The question now is , after subtracting 32767 from each unsigned sample, will the new signed samples represent the same original voice </span><span>? <br></span></div><div><span> For explanation, assume "Hi" is said in 8000 unsigned sample ,if i subtract 32767 from each sample and play the resulting 8000 sample as signed PCM samples,will they be "Hi" ?!</span></div><div><span><br></span></div><div><span>Forgive me about my questions , but it's important for me and i am new to the stuff<br></span></div><div><span>Best Regards,</span></div><div><span>Mash'al<br></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 14pt;"> <div style="font-family: times new roman, new york, times, serif;
font-size: 12pt;"> <div dir="ltr"> <font face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Arthurc <arthurc99@yahoo.com><br> <b><span style="font-weight: bold;">To:</span></b> Mashal al-shboul <shboul8989@yahoo.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 14, 2012 5:58 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Speex-dev] converting unsigned short sample to signed short sample<br> </font> </div> <br>
<div id="yiv371411165"><div><div>I assumed that you have unsigned input from your sound card / codec, etc.</div><div>Actually, it is unlikely in today's hardware platform for audio application.</div><div><br></div><div>If that is really the case, you can just do..</div><div><br></div><div>short output = ((long) input) - 32767</div><div><br></div><div>Well, maybe it is possible to do some bit manipulation to achieve the same thing.</div><div><br></div><div>Regards</div><div>Arthur </div><div><br>On 2012年3月14日, at 上午11:21, Mashal al-shboul <<a rel="nofollow" ymailto="mailto:shboul8989@yahoo.com" target="_blank" href="mailto:shboul8989@yahoo.com">shboul8989@yahoo.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:14pt;"><div><span class="yiv371411165tab"> Hi All,</span></div><div><span
class="yiv371411165tab">I would like to get your help in my problem,</span></div><div><br><span class="yiv371411165tab"></span></div><div><span class="yiv371411165tab">we know that Speex codec takes samples of type <span style="font-weight:bold;">short</span> (signed), range:-2^15 to2^15 -1 , my problem is that i have samples of type <span style="font-weight:bold;"><br></span></span></div><div><span class="yiv371411165tab"><span style="font-weight:bold;">unsigned short </span>,range: 0 to 2^16 -1. so, what should i do in order to apply speex on my unsigned samples ?.<br></span></div><div><span class="yiv371411165tab"> There is a proposed solution to subtract 2^15-1 from each unsigned short to get it signed short, my question: is this method safe in keeping the samples meaningful for
speex's processing algorithms?. <br></span></div><div><span class="yiv371411165tab">i hope i receive help from you. Thanks in advance</span></div><div><span class="yiv371411165tab"><br></span></div><div><span class="yiv371411165tab">Regards,</span></div><div><span class="yiv371411165tab">Mash'al<br></span></div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Speex-dev mailing list</span><br><span><a rel="nofollow" ymailto="mailto:Speex-dev@xiph.org" target="_blank" href="mailto:Speex-dev@xiph.org">Speex-dev@xiph.org</a></span><br><span>http://lists.xiph.org/mailman/listinfo/speex-dev</span><br></div></blockquote></div></div><br><br> </div> </div> </div></body></html>